Echoes in Time - Norton, Andre, and Smith, Sherwood

Time agents Ross Murdock and Eveleen Riorden are recalled from their honeymoon to take part in a dangerous assignment: find a team of Russian scientists that has vanished without a trace from a distant planet.

Echoes in Time 2000, Tor Books

ISBN-13: 9780812552744

Mass-market paperback

Echoes in Time 1999, Tor Books, New York, NY

ISBN-13: 9780312859213